Reduce Pressure In The High-Pressure System - Skoda Octavia III 2013 Workshop Manual

Octavia III 2013 ➤ , Octavia III 2014 ➤
1.2/63; 77 kW TSI engine - Edition 11.2014
♦ Fuel hoses in the engine compartment must only be secured
with spring-type clips ⇒ electronic catalogue of original
parts"ETKA" . The use of clamp or screw-type clips is not per‐
missible.
♦ A minimum voltage of 11.5 V is required for perfect functioning
of the electrical components.
♦ Do not use sealants containing silicone. Traces of silicone el‐
ements drawn in by the engine are not burnt in the engine and
damage the lambda probe.
♦ Certain inspections may cause the control unit to detect and
store a fault. It is therefore necessary to interrogate the event
memory after having completed all inspections and repairs,
and if necessary delete ⇒ Vehicle diagnostic tester.
Safety precautions when working on the injection system
⇒ "2.5 Safety precautions when working on the injection system",
page 5 .
3.10 Reduce pressure in the high-pressure
system
Caution
The injection system consists of a high pressure part (max.
pressure of 12 MPa = 120 bar) and a low pressure part (pres‐
sure of approx. 0.7 MPa = 7 bar).
Before opening the high pressure system, e.g. removing the
high pressure pump, the fuel distributor, the injection valves,
the fuel pipes or the fuel pressure sender - G247- , the fuel
pressure in the high pressure system with a remaining pres‐
sure of approx. 0.7 MPa (7 bar) must be reduced.
– Connect the ⇒ Vehicle diagnostic tester and carry out the tar‐
geted function "remove high fuel pressure".
• The fuel pressure drops to a predetermined value.
– Switch off ignition.
– Before opening the fuel system, disconnect the plug from the
fuel pump control unit.
– Before opening the high pressure system, lay cleaning cloths
around the connection point.
– Open fuel system carefully to reduce the residual pressure of
0.7 MPa (7 bar) and when doing so collect fuel that is flowing
out.
Note
If the high-pressure system is not opened immediately the
♦
pressure increases again as a result of the reheating effect.
The ignition system must no longer be switched on, since oth‐
♦
erwise the pressure will increase again.
♦ Interrogate the event memory of the engine control unit at the
end of the following work and delete all the event memory en‐
tries.
The readiness code must be generated if the event memory
♦
has been cleared ⇒ Vehicle diagnostic tester.
10
Rep. gr.00 - Technical data